532  * @whole: whole block device containing @bdev, may equal @bdev
543 static bool bd_may_claim(struct block_device *bdev, struct block_device *whole,  in bd_may_claim()  argument
550 	else if (whole == bdev)  in bd_may_claim()
551 		return true;  	 /* is a whole device which isn't held */  in bd_may_claim()
553 	else if (whole->bd_holder == bd_may_claim)  in bd_may_claim()
555 	else if (whole->bd_holder != NULL)  in bd_may_claim()
575 	struct block_device *whole = bdev_whole(bdev);  in bd_prepare_to_claim()  local
582 	if (!bd_may_claim(bdev, whole, holder)) {  in bd_prepare_to_claim()
588 	if (whole->bd_claiming) {  in bd_prepare_to_claim()
589 		wait_queue_head_t *wq = bit_waitqueue(&whole->bd_claiming, 0);  in bd_prepare_to_claim()
600 	whole->bd_claiming = holder;  in bd_prepare_to_claim()
606 static void bd_clear_claiming(struct block_device *whole, void *holder)  in bd_clear_claiming()  argument
610 	BUG_ON(whole->bd_claiming != holder);  in bd_clear_claiming()
611 	whole->bd_claiming = NULL;  in bd_clear_claiming()
612 	wake_up_bit(&whole->bd_claiming, 0);  in bd_clear_claiming()
625 	struct block_device *whole = bdev_whole(bdev);  in bd_finish_claiming()  local
628 	BUG_ON(!bd_may_claim(bdev, whole, holder));  in bd_finish_claiming()
630 	 * Note that for a whole device bd_holders will be incremented twice,  in bd_finish_claiming()
633 	whole->bd_holders++;  in bd_finish_claiming()
634 	whole->bd_holder = bd_may_claim;  in bd_finish_claiming()
637 	bd_clear_claiming(whole, holder);  in bd_finish_claiming()
727 	struct block_device *whole = bdev_whole(part);  in blkdev_put_part()  local
732 	whole->bd_disk->open_partitions--;  in blkdev_put_part()
733 	blkdev_put_whole(whole, mode);  in blkdev_put_part()
913 		struct block_device *whole = bdev_whole(bdev);  in blkdev_put()  local
924 		WARN_ON_ONCE(--whole->bd_holders < 0);  in blkdev_put()
928 		if (!whole->bd_holders)  in blkdev_put()
929 			whole->bd_holder = NULL;  in blkdev_put()